13 "github.com/jinzhu/gorm"
14 log "github.com/sirupsen/logrus"
15 // dbm "github.com/vapor/database/leveldb"
17 vaporCfg "github.com/vapor/config"
18 "github.com/vapor/crypto/ed25519/chainkd"
19 "github.com/vapor/p2p"
20 // conn "github.com/vapor/p2p/connection"
21 // "github.com/vapor/consensus"
22 // "github.com/vapor/crypto/sha3pool"
23 "github.com/vapor/p2p/discover/dht"
24 "github.com/vapor/p2p/discover/mdns"
25 "github.com/vapor/p2p/signlib"
26 "github.com/vapor/toolbar/precog/config"
27 "github.com/vapor/toolbar/precog/database/orm"
38 nodeCfg *vaporCfg.Config
40 discvCh chan *dht.Node
44 func NewMonitor(cfg *config.Config, db *gorm.DB) *monitor {
45 nodeCfg := &vaporCfg.Config{
46 BaseConfig: vaporCfg.DefaultBaseConfig(),
47 P2P: vaporCfg.DefaultP2PConfig(),
48 Federation: vaporCfg.DefaultFederationConfig(),
50 nodeCfg.DBPath = "vapor_precog_data"
51 nodeCfg.ChainID = "mainnet"
52 discvCh := make(chan *dht.Node)
53 privKey, err := signlib.NewPrivKey()
63 privKey: privKey.(chainkd.XPrv),
67 func (m *monitor) Run() {
68 defer os.RemoveAll(m.nodeCfg.DBPath)
70 for _, node := range m.cfg.Nodes {
74 sw, err := m.makeSwitch()
86 // create or update: https://github.com/jinzhu/gorm/issues/1307
87 func (m *monitor) upSertNode(node *config.Node) error {
89 node.PublicKey = fmt.Sprintf("%v", node.XPub.PublicKey().String())
92 ormNode := &orm.Node{PublicKey: node.PublicKey}
93 if err := m.db.Where(&orm.Node{PublicKey: node.PublicKey}).First(ormNode).Error; err != nil && err != gorm.ErrRecordNotFound {
98 ormNode.Alias = node.Alias
100 if node.XPub != nil {
101 ormNode.Xpub = node.XPub.String()
103 ormNode.Host = node.Host
104 ormNode.Port = node.Port
105 return m.db.Where(&orm.Node{PublicKey: ormNode.PublicKey}).
108 Alias: ormNode.Alias,
111 }).FirstOrCreate(ormNode).Error
114 func (m *monitor) makeSwitch() (*p2p.Switch, error) {
115 l, listenAddr := p2p.GetListener(m.nodeCfg.P2P)
116 discv, err := dht.NewDiscover(m.nodeCfg, m.privKey, l.ExternalAddress().Port, m.cfg.NetworkID)
121 // no need for lanDiscv, but passing &mdns.LANDiscover{} will cause NilPointer
122 lanDiscv := mdns.NewLANDiscover(mdns.NewProtocol(), int(l.ExternalAddress().Port))
123 return p2p.NewSwitch(m.nodeCfg, discv, lanDiscv, l, m.privKey, listenAddr, m.cfg.NetworkID)
126 func (m *monitor) discovery() {
127 ticker := time.NewTicker(time.Duration(discvFreqSec) * time.Second)
129 nodes := make([]*dht.Node, nodesToDiscv)
130 n := m.sw.GetDiscv().ReadRandomNodes(nodes)
131 for i := 0; i < n; i++ {
132 m.discvCh <- nodes[i]
137 func (m *monitor) collectDiscv() {
138 // nodeMap maps a node's public key to the node itself
139 nodeMap := make(map[string]*dht.Node)
140 for node := range m.discvCh {
141 if n, ok := nodeMap[node.ID.String()]; ok && n.String() == node.String() {
144 log.Info("discover new node: ", node)
146 m.upSertNode(&config.Node{
147 PublicKey: node.ID.String(),
148 Host: node.IP.String(),
151 nodeMap[node.ID.String()] = node
155 func (m *monitor) dialRoutine() {
157 m.cfg.CheckFreqSeconds = 60
158 ticker := time.NewTicker(time.Duration(m.cfg.CheckFreqSeconds) * time.Second)
159 for ; true; <-ticker.C {
164 func (m *monitor) dialNodes() {
165 var nodes []*orm.Node
166 if err := m.db.Model(&orm.Node{}).Find(&nodes).Error; err != nil {
171 addresses := make([]*p2p.NetAddress, 0)
172 for i := 0; i < len(nodes); i++ {
173 ip, err := net.LookupIP(nodes[i].Host)
174 if err != nil || len(ip) == 0 {
178 address := p2p.NewNetAddressIPPort(ip[0], nodes[i].Port)
179 addresses = append(addresses, address)
182 m.sw.DialPeers(addresses)
186 // implement logic first, and then refactor
187 // /home/gavin/work/go/src/github.com/vapor/
189 // p2p/switch_test.go
192 // TODO: dail nodes, get lantency & best_height
193 // TODO: decide check_height("best best_height" - "confirmations")
194 // TODO: get blockhash by check_height, get latency
195 // TODO: update lantency, active_time and status